* [PATCH] doc: document UNICORN_FD in manpage
@ 2015-03-12 22:32 Eric Wong
0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2015-03-12 22:32 UTC (permalink / raw)
Due to the prevalence of socket activation in modern init systems,
we shall document UNICORN_FD (previously an implementation detail)
in the manpage.
Documentation/unicorn.1.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/unicorn.1.txt b/Documentation/unicorn.1.txt
index 376a6c6..b03962e 100644
@@ -163,6 +163,13 @@ set in the old master process are inherited by the new master process.
Unicorn only uses (and will overwrite) the UNICORN_FD environment
variable internally when doing transparent upgrades.
+UNICORN_FD is a comma-delimited list of one or more file descriptors
+used to implement USR2 upgrades. Init systems may bind listen sockets
+itself and spawn unicorn with UNICORN_FD set to the file descriptor
+numbers of the listen socket(s). The unicorn CONFIG_FILE must still
+have the inherited listen socket parameters defined as in a normal
+startup, otherwise the socket will be closed.
# SEE ALSO
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2015-03-12 22:32 [PATCH] doc: document UNICORN_FD in manpage Eric Wong
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